I created this project for my grade 6 students for science class. It fits the Ontario curriculum, but it may work for others.
This product includes the rubric and the checklist for students (2 pages).
The project requires students to research a specific ecosystem (of their choice), and look at the interrelationships among and between species and their environment. They will answer the question, "How do species work together with others species to maintain biodiversity? How do species work within their own species to maintain biodiversity? How does the environment support biodiversity of species (air/sun/water, etc.)?". Student will also assess how humans might affect biodiversity in this ecosystem, both positive and negatively, and submit a paragraph about that as well.
Students submit 4 typed paragraphs, a 3D model of their chosen ecosystem with labels, and give a short oral presentation.
I plan for this project to take 2-3 weeks of in-class research time, 1 period per day. I also allowed my students to build the 3D displays at home, although they will be self-assessing their independence while creating the display. I told them to aim for a short 1-2 minute "show and share" of their display. (This project also works beautifully for a drop-in parent event!)